Advice on buying servos.

[Gary]

Yes, but there are different types of absolute. you have single turn and multi-turn, the name is self-explanatory.
Also, Absolute encoders have a much higher resolution than incremental.

Thanks again. Not cheap then.

While I'm here. Am I right in thinking that the advantage of an absolute encoder over incremental is that the motor position is known after power-down?

[Agathon]

Yes, but there are different types of absolute. you have single turn and multi-turn, the name is self-explanatory.
Also, Absolute encoders have a much higher resolution than incremental.

Thanks. I notice that you have both DC brushless and AC servos on your website - what are the advantages and disadvantages?

[Boyan Silyavski]

Thanks again. Not cheap then.

Servo controller for me is a must for a metal working machine, a heavy gantry router or a high precision machine for miniature machining, industrial production machine that needs to be fast as possible For all else a stepper will do just fine job.

[Agathon]

Servo controller for me is a must for a metal working machine, a heavy gantry router or a high precision machine for miniature machining, industrial production machine that needs to be fast as possible For all else a stepper will do just fine job.

What I really meant was that servos for spindles weren't cheap. I'm a great believer in "getting what you pay for". I can live without a servo spindle, but I think I need to invest in servos for the x and y axes of my mill.